1、BSI Standards PublicationM e t a l l i c C o m m u n i c a t i o nC a b l e t e s t m e t h o d sPart 4-15: Electromagnetic compatibility (EMC) Test method for measuring transfer impedance and screening attenuation or couplingattenuation with triaxial cellBS IEC 62153-4-15:2015National forewordThis
2、British Standard is the UK implementation of IEC 62153-4-15:2015.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/46, Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling.A list of organizations represented on this c
3、ommittee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82281 0ICS 33.10
4、0; 33.120.10 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IE
5、C 62153-4-15:2015IEC 62153-4-15 Edition 1.0 2015-12 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-15: Electromagnetic compatibility (EMC) Test method for measuring transfer impedance and screening attenuation or coupling attenuation with triaxial cell INTERNATIONAL ELECTROT
6、ECHNICAL COMMISSION ICS 33.100; 33.120.10 ISBN 978-2-8322-3056-5 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinsideBS IEC 62153-4-15:2015 2 IEC 62153-4-15:2015 IEC 2015 CONTENTS FORE
7、WORD . 5 1 Scope 7 2 Normative references . 7 3 Terms and definitions. 8 4 Physical background 10 5 Principle of the test methods 10 5.1 General . 10 5.2 Transfer impedance 11 5.3 Screening attenuation 12 5.4 Coupling attenuation . 12 5.5 Tube in tube method . 13 6 Test procedures . 13 6.1 General .
8、 13 6.2 Triaxial cell . 13 6.3 Cut off frequencies, higher order modes 13 6.4 Test equipment . 14 6.5 Calibration procedure 14 6.6 Test leads and connecting cables to DUT 15 7 Sample preparation 15 7.1 Coaxial connector or assembly or quasi-coaxial component . 15 7.2 Balanced or multipin connector o
9、r component 15 7.3 Cable assemblies 16 7.4 Other screened devices . 17 8 Transfer impedance (short matched) . 17 8.1 General . 17 8.2 Principle block diagram of transfer impedance . 17 8.3 Measuring procedure . 18 8.4 Evaluation of test results . 18 8.5 Test report 18 9 Screening attenuation 19 9.1
10、General . 19 9.2 Impedance matching . 19 9.3 Measuring with matched conditions . 19 9.3.1 Procedure 19 9.3.2 Evaluation of test results 19 9.4 Measuring with mismatch 20 9.4.1 General . 20 9.4.2 Evaluaton of test results . 20 9.5 Test report 21 10 Coupling attenuation 21 10.1 Procedure . 21 10.2 Exp
11、ression of results . 21 10.3 Test report 22 11 Coupling transfer function 22 Annex A (informative) Principle of the triaxial test procedure . 23 BS IEC 62153-4-15:2015IEC 62153-4-15:2015 IEC 2015 3 Annex B (informative) Triaxial cell 25 Annex C (informative) Cut off frequencies, higher order modes .
12、 27 Annex D (informative) Coupling transfer function 30 Annex E (informative) Attenuation versus scattering parameter S2132 Annex F (informative) Application of a moveable shorting plane 34 F.1 Effect of the measurement length on the measurement cut-off frequency . 34 F.2 Details of the movable shor
13、ting plane 34 F.3 Measurement results . 36 Annex G (informative) Correction in case the receiver input impedance R is higher than the characteristic impedance of the outer circuit Z237 Bibliography 39 Figure 1 Definition of ZT. 8 Figure 2 Principle depiction of the triaxial cell to measure transfer
14、impedance and screening attenuation 11 Figure 3 Principle depiction of the triaxial cell to measure transfer impedance and screening attenuation of assemblies with tube in tube according to IEC 62153-4-7 11 Figure 4 Preparation of balanced or multipin connectors for transfer impedance and screening
15、attenuation 16 Figure 5 Preparation of balanced or multipin connectors for coupling attenuation measurement 16 Figure 6 Test set-up (principle) for transfer impedance measurement according to test method B of IEC 62153-4-3 17 Figure A.1 Principle test set-up to measure transfer impedance and screeni
16、ng attenuation 23 Figure A.2 Equivalent circuit of the principle test set-up in Figure A.1 23 Figure B.1 Principle depiction of the triaxial cell to measure transfer impedance and screening attenuation at HV-assemblies with tube in tube according to IEC 62153-4-7 25 Figure B.2 Example of different d
17、esigns of triaxial cells 26 Figure C.1 Comparison of the measurements with tube and with triaxial cell of a RG 11 cable with single braid construction, linear scale . 28 Figure C.2 Comparison of the measurements with tube and with triaxial cell of a cable RG 11 with single braid construction, log sc
18、ale 29 Figure D.1 Measured coupling transfer function of a braided screen vs. frequency with the triaxial cell 30 Figure E.1 Measurement with HP8753D of S21of a 3dB attenuator 32 Figure E.2 Measurement with ZVRE of S21of a 3dB attenuator . 33 Figure F.1 Crosssection of triaxial cell with movable sho
19、rting plane. 34 Figure F.2 Crosscut of plane shortening housing and tube-in-tube 35 Figure F.3 Detail H of figure F.2: contact between plane and housing 35 Figure F.4 Detail G of figure F.2: contact between plane and tube-in-tube . 36 Figure F.5 Compilation of transfer impedance test results with di
20、fferent shorting plane distances 36 Figure G.1 Example of forward transfer scattering parameter S21for different impedances in the outer circuit where the receiver input impedance is 50 37 Figure G.2 DUT with uniform cylindrical shape in the centre of the cell 38 BS IEC 62153-4-15:2015 4 IEC 62153-4
21、-15:2015 IEC 2015 Table 1 IEC 62153-4-x, Metallic communication cable test methods Test procedures with triaxial test set-up 10 Table C.1 Resonance frequencies of different triaxial cells . 27 BS IEC 62153-4-15:2015IEC 62153-4-15:2015 IEC 2015 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METALLIC C
22、OMMUNICATION CABLE TEST METHODS Part 4-15: Electromagnetic compatibility (EMC) Test method for measuring transfer impedance and screening attenuation or coupling attenuation with triaxial cell FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardiza
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29、 or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carr
30、ied out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Com
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32、to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be
33、 held responsible for identifying any or all such patent rights. International Standard IEC 62153-4-15 has been prepared by IEC technical committee 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories. The text of this standard is based on the followi
34、ng documents: FDIS Report on voting 46/573/FDIS 46/586/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. BS IEC 62153-4-15:2015 6
35、 IEC 62153-4-15:2015 IEC 2015 A list of all the parts in the IEC 62153-4 series published under the general title Metallic Communication Cable test methods Electromagnetic compatibility (EMC), can be found on the IEC website. The committee has decided that the contents of this publication will remai
36、n unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be iss
37、ued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. BS IEC 62153-4-15:2015IEC
38、 62153-4-15:2015 IEC 2015 7 METALLIC COMMUNICATION CABLE TEST METHODS Part 4-15: Electromagnetic compatibility (EMC) Test method for measuring transfer impedance and screening attenuation or coupling attenuation with triaxial cell 1 Scope This part of IEC 62153 specifies the procedures for measuring
39、 with triaxial cell the transfer impedance, screening attenuation or the coupling attenuation of connectors, cable assemblies and components, e.g. accessories for analogue and digital transmission systems and equipment for communication networks and cabling (in accordance with the scope of IEC techn
40、ical committee 46). Measurements can be achieved by applying the device under test direct to the triaxial cell or with the tube in tube method in accordance with IEC 62153-4-7. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are in
41、dispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61196-1, Coaxial communication cables Part 1: Generic specification General, definitions and requiremen
42、ts IEC TS 62153-4-1:2013, Metallic communication cable test methods Part 4-1: Electromagnetic Compatibility (EMC) Introduction to electromagnetic screening measurements IEC 62153-4-3, Metallic communication cable test methods Part 4-3: Electromagnetic compatibility (EMC) Surface transfer impedance T
43、riaxial method IEC 62153-4-4, Metallic communication cable test methods Part 4-4: Electromagnetic compatibility (EMC) Shielded screening attenuation, test method for measuring of the screening attenuation as up to and above 3 GHz IEC 62153-4-7, Metallic communication cable test methods Part 4-7: Ele
44、ctromagnetic compatibility (EMC) Test method for measuring the transfer impedance and the screening or the coupling attenuation Tube in tube method IEC 62153-4-8, Metallic communication cable test methods Part 4-8: Electromagnetic compatibility (EMC) Capacitive coupling admittance IEC 62153-4-9:2009
45、, Metallic communication cable test methods Part 4-9: Electromagnetic compatibility (EMC) Coupling attenuation of screened balanced cables, triaxial method IEC 62153-4-10, Metallic communication cable test methods Part 4-10: Shielded screening attenuation test method for measuring the screening effe
46、ctiveness of feed-troughs and electromagnetic gaskets double coaxial method BS IEC 62153-4-15:2015 8 IEC 62153-4-15:2015 IEC 2015 IEC TS 62153-4-16, Metallic communication cable test methods Part 4-16: Extension of the frequency range to higher frequencies for transfer impedance and to lower frequen
47、cies for screening attenuation measurements using the triaxial set-up 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61196-1 and the following apply. 3.1 triaxial cell rectangular housing in analogy to the principles of the triaxial test procedure,
48、consisting of a non-ferromagnetic metallic material Note 1 to entry: The triaxial test procedure is described in IEC 62153-4-3 and IEC 62153-4-4. 3.2 surface transfer impedance ZTfor an electrically short screen, quotient of the longitudinal voltage U1induced to the inner circuit by the current I2fe
49、d into the outer circuit or vice versa (see Figure 1) Note 1 to entry: The value ZTof an electrically short screen is expressed in ohms or decibels in relation to 1 . Figure 1 Definition of ZT21TIUZ = (1) ( )=1lg20dBTTZZ (2) 3.3 effective transfer impedance ZTEimpedance defined as: TFTEmax ZZZ = (3) where ZFis the capacitive coupling impedance IEC U1l Lor r1o10 Lcf (7) where L i
